GE zet3038sh3SS baking element question

[Biglagoon9]

This baking element has an inner and outer loop. The inner loop glows red but the outer loop does not. I measures resistant and power coming into the elements and both are in specs. When I put in service mode and cooking load bake 2 element heats up but does not glow. Is this normal? I had purchased an oven thermometer and when preheating to 350 inside read about 60 degrees low. It reached 350 in about 22 minutes. During the preheat process I noticed outer element loop did not glow so thought this May be a problem.

Thanks!

[Samurai Appliance Repair Man]

On January 2, 2016 at 9:32 PM, Biglagoon9 said:

When I put in service mode and cooking load bake 2 element heats up but does not glow. Is this normal?

Tech sheet shows each element loop gets L1 and L2 when energized in test mode. Also shows where to test for the voltage on the main board:

Bake Element: L1 = K8-NO  L2 = K11-COM (DLB)

Bake Element2: L1 = J113 (K103-NO)  L2 = K11-COM (DLB)

If you're only getting half voltage, 120 VAC, then this would cause the element to get hot but not glow. 

[Samurai Appliance Repair Man]

I should expand a bit on my previous post. 

All the oven elements, broil, bake, bake2, and convection, run on either 120 or 24 VAC. The power supply switching for broil, bake, and bake2 is controlled by the K11 DLB relay. Power supply switching for the convection element is controlled by K102. You can see this in the marked-up schematic below:

 

As drawn, with K11 in the NC state, the broil, bake, and bake2 elements are supplied with 120 VAC. When K11 switches to NO, the power supply to these elements is switched to 240 VAC. Schematically, all elements are affected at the same time. But the fact that K102 is called out as the CONV UP / BAKE 2 relay would indicate that there is a logic control scheme that can supply 240 VAC to the convection element to be used as an option during preheat in the Bake function. This is indicated on the element cycling table in the minimanual. 

The individual element relays, K7, K8, K10, and K103 control power to the respective individual elements. 

[Biglagoon9]

Thank you for your reply. I tested 240 V at the wire connectors that plug directly into bake element 2 when energized in the test mode. I did not measure voltage at the main control board. Is testing the voltage at the wires that plug into the bake 2 element a satisfactory test or do I need to also measure at the  MCB? I would think since I have 240V at the leads to the bake 2 element and that it does not glow it would indicate that the bake 2 element is not good. I called GE Monogram and they confirmed that the bake 2 element should glow in pre heat and in test mode under load.

 

[Samurai Appliance Repair Man]

Testing at the element is fine. If you have 240 VAC at the element and the element is not glowing then either the element is open or its resistance is too high. What resistance did you measure for that element?